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Hi,<br>
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Sorry, there is a typo on the date is Monday February <b>17</b> at 1:00 PM</div>
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<pre cols="72" style="white-space:pre-wrap">--</pre>
<pre cols="72" style="white-space:pre-wrap">Postdoctoral researcher
Theory Center - Jefferson Lab
12000 Jefferson Avenue,
Newport News, VA 23606 USA
CEBAF center, office A206</pre>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Carlota Andres Casas<br>
<b>Sent:</b> Friday, February 14, 2020 8:22 PM<br>
<b>To:</b> theory-seminars@jlab.org <theory-seminars@jlab.org><br>
<b>Subject:</b> Seminar next week</font>
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Dear all,<br>
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Here is a reminder of the seminar next week</div>
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<b><u>Theory seminar</u></b></div>
<div style=""><font color="#000000" face="Calibri, Arial, Helvetica, sans-serif"><span style="font-size:12pt">Monday, Feb 14, 1:00PM, Room L102</span></font><br>
<div style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Matthias Burkardt (New Mexico State University), "<span>The ultimate free lunch: the light-front vacuum"<br>
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<div><span style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">Abstract:</span><br>
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<div>Light-front (LF) wave functions play an important role in the physical interpretation of experiments probing hadron structure. For example, generalized parton distributions that are probed in deeply virtual Compton scattering (DVCS) experiments, and ploy
a central role in femtography, have a particularly simple representation in terms of overlap integrals involving LF wave functions. LF wave functions in impact parameter space can be used to easily construct transverse images of the nucleon. Transverse correlations
and forces are important for the interpretation of single-spin asymmetries in SIDIS experiment.<br>
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<span>In principle, LF wave functions are obtainable as eigenstates of a LF Hamiltonian. LF Hamiltonians have a trivial ground state, which seems is a great advantage as no computer time is wasted calculating the structure of the vacuum when one is interested
in hadron structure. However, there are many arguments that support the idea that the QCD vacuum has a nontrivial structure. Using both perturbative and non-perturbative examples, I will explain how a trivial LF vacuum can be consistent with nontrivial vacuum
structure.</span><br>
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<span><span style="margin:0px; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">Bluej</span><span style="margin:0px; font-size:medium; font-family:Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">eans connection: </span><span style="margin:0px; font-size:medium; font-family:Arial,Helvetica,sans-serif; color:rgb(34,34,34); background-color:rgb(255,255,255)"><a href="https://bluejeans.com/610445877" target="_blank" rel="noopener noreferrer" style="margin:0px; color:rgb(17,85,204)"><span style="margin:0px; color:rgb(12,100,192)">https://bluejeans.<wbr>com/610445877</span></a></span><span style="margin:0px; font-size:medium; font-family:Arial,Helvetica,sans-serif; color:rgb(12,100,192); background-color:rgb(255,255,255)"> </span><br>
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<span><span style="margin:0px; font-size:medium; font-family:Arial,Helvetica,sans-serif; color:rgb(12,100,192); background-color:rgb(255,255,255)"><br>
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<div style=""><font color="#0c64c0" face="Arial, Helvetica, sans-serif" size="3"><span style="color:rgb(0,0,0)">Raza, Miguel, and Carlota</span></font></div>
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